Dawnshine Wonder

If Princess Celestia in MLP allowed herself to become Daybreaker, does any fan seriously think she would stop at deleting Luna for the Nightmare Moon fiasco? oh no, when Corrupted authoritarian leaders drop their mercy it rarely works out like that, not likely, she would become a tyrant who kills or exiles other Ponies that did the slightest thing to upset her as well, and it can be small things like not showing loyalty to her, or being in opposition to her power grab. If she truly believed "she does not need anypony" as she stated in Royal Problem, that statement alone carries dark implications for what she might do to a Pony that doesn't follow her orders.